The AU-9900
is one of the largest and most advanced of any integrated stereo pre/power
amplifiers yet introduced in the popular Sansui AU Series, instruments created
to deliver the famed Sansui tonal quality al. The high power output levels
demanded by today's true audiophiles.
Parallel
Push-Pull Power Output Section.
The power
amplifier section of this robust stereo component features a diferential
amplifier and a 3-stage Darlington system designed in the parallel push-pull
format. The results include a continuous power output of 80 watts, min. RMS,
per channel, both channels driven into 8 ohms, over a 20 Hz to 20 kHz bandwidth
with no more than 0,08% total harmonic distortion.
Stablized,
Well-Regulated Power Source
The power
supply section is one of the most stable and dependable ever developed,
providing plus-minus symmetrical voltages to all circuits as needed. Oversized
power capacitors help provide extra stability, while the use of an advanced
toroidal transformer further assures better power regulation and exceptionally
low induced hum.
Excellent
R.I.A.A. Equalization
The phono
equalizer consists of two amplifying sections each with a differential
amplifier. High frequency roll-off is
made by the CR type circuit and low frequency turn-over is made by the NF type
circuit, most accurately and with very low distortion.
Effective
Triple Tone Control
Sansui's
popular Triple Tone Control circuit is featured in the AU-9900 to provide the
best, most flexible tonal adjustment control yet developed. Twelve trans istors are used in the circuit, itself
built around an initial stage using, a differential amplifier. The individual
controls for Bass, Midrange and Treble are made still more convenient by the
selectable turnover switches for Bass (600 Hz, 300 Hz or 150 Hz) and Treble (8
kHz, 4 kHz or 2 kHz).
Quadruple
Protection Circuits
Changes in
temperature, line voltage supply or shorts in speaker leads or terminals are
instantly detected and can cause no damage to the power transistors or
connected speakers thanks to the use of four separate protection circuits.
These are: [1] a temperature sensing circuit, [2] a DC voltege detection
circuit, [3] an ASO (Area of Safety Operation) circuit, and [4] an overload
detection circuit.
Tone Defeat
Switch
Like the
AU-20000 and AU-11000, this integrated amplifier provides the convenience of
being able to cancel all tone control adjustments instantly with a Tone Defeat
Switch
Two-Stepped
Low/High Filters
The low
Filter has positions for 12 dB/oct. attenuation at 20 Hz or 60 Hz; the high Filter is selectable for 6 dB/oct.
cut-off at 7 kHz or 12 dB/oct. cut-off at 12 kHz
Other
Valuable Features
Teh AU-9900
provides every convenience needed for professional and semi-professional use,
included are a hand-trimmed precision volume comtrol, input/output terminals
for up to two stereo decks, with full monitoring and deck-to-deckdubbing, a
quick-access Tuner Switch, Mode Switch, Level Selector (0 dB/ -10 dB/ -20 dB)
and an Audio Muting Switch.
Specifications
Power Output
(min. RMS, both ch. driven, 20-20,000 Hz, no more than 0,05% T.H.D.):
80 watts per
channel into 4 and 8 ohms
Load
Impedance: 4 and 8 ohms
Power
Bandwidth: 20 - 20,000 Hz (at or below
rated min. RMS power output and T.H.D.)
Total
Harmonic Distortion (overall from AUX): less than 0,05% (at or below rated min.
RMS power output and T.H.D.)
Intermodulation
Distortion (70 Hz : 7 kHz = 4:1 SMPTE method):
Overall
(from AUX) less than 0,05%
Frequency
Response (at 1 watt):
Overall (AUX
to power output) 10 to 50,000 Hz +0 dB, -1 dB
RIAA Curve
Deviation (Phono): +0,3 dB, -0,3 dB (30
to 15,000 Hz)
Channel
Separation (at rated output 1,000 Hz):
Phono 1 and
2 : better than 55 dB
Tuner : better than 60 dB
Aux 1 and 2
: better than 60 dB
Power
Amplifier: better than 70 dB
Tape Monitor
: better than 60 dB
Hum and
Noise (IHF):
Phono 1 and
2 : better than 65 dB
Tuner : better than 80 dB
Aux 1 and 2
: better than 80 dB
Power
Amplifier: better than 100 dB
Tape Monitor
: better than 80 dB
Input
Sensitivity/Impedance:
Phono 1
: 2 mV, 4 mV, 8 mV / 30 k, 50 k, 100 k Ω
Phono 2
: 2 mV/ 50 k Ω
Max.input
Capability: more than 300 mV rms 0,1%
distortion
Tuner : 130 mV /50 k Ω
Aux 1 and 2
: 130 mV / 50 k Ω
Tape Pb 1 and 2 :
130 mV (PIN)
Tape Pb 2
: 130 mV (DIN)
Recording
Output:
Tape 1
: 130 mV (PIN)
Tape 2
: 130 mV (PIN); 30 mV (DIN)
Controls:
Bass : +10 dB; -10 dB at 30 Hz
Midrange
: +5 dB, -5 dB at 1,500 Hz
Treble: +10 dB, -10 dB at 20 kHz
Tone
Selectors:
Bass : 150 Hz, 300 Hz, 600 Hz
Treble: 2 kHz, 4 kHz, 8 kHz
Filters:
Low : -3 dB at 20 Hz (12 dB/oct); -3 dB at 60 Hz
(12 dB/oct)
High : -3 dB at 7 kHz (6 dB/oct); -3 dB at 12 kHz
(12 dB/oct)
Muting: 0 dB; -20 dB
Level Set: 0
dB; -10 dB; -20 dB
Power
Requirements
Voltage
: 100; 120; 220; 240 V , 50/60 Hz
Consumption: 180 watts Rated
Dimensions
((W x H x D): 460 x 160 x 375 mm
(18-1/8" x 6-5/16" x 14-49/64")
Weight
[net/packed]: 18 kg (39,7 lbs)/ 20,3 kg
(44,8 lbs)
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